Controller.



No. 874,638. PATENTED DEC. 24, 1907.

' B. W. STULL.

. CONTROLLER.

AIPLIOATIOH FILED an s, 1906.

2 SHEETS-SHEET 1.

INYENTOR Q WITNES ES Emmett W.Slull j Y ATTORNEY No. 874,638. PATENTED DEG. 24,, 1907. E. W. STULL. CONTROLLER.

APPLICATION FILED MAY 3, 1908.

Fig.6.

Boih Motors Connected Motor N 2 Cut Out series Parallel I Hu 0 I i 1" INVENTOR WITNESSES Emmefl WSIull I BY 2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

EMMETT W. STULL, OF NORWOOD, OHIO, ASSIGNOR TO ALLISC'HALMERS COMPANY, A CORPO- RATION OF NEW JERSEY, AND THE BULLOCK ELECT CORPORATION OF OHIO.

CONTROLLER.

Patented Dec. 24, 1907.

Application filed May 3. 1906. Serial No. 814,919.

[0 all whom it may concern:

'Be it known that I, EMMETT W. STULL, citizen of the United States, residing at N orwood, in the county of Hamilton and State of Ohio, haveinvented certain new and useful Improvements in Controllers, of which the following is a full, clear, and exact specification.

My invention relates to controllers for electric motors and particularly to series-parallel railway motor controllers.

One of the objects of my invention is to enable an injured or disabled motor to be cut out ofcircuit without interfering with the regulation of the remaining motor or motors by the controller in all positions of the latter. Heretofore, when a motor was injured and was therefore out out, the remaining motor or motors could only be operated in certain. positions of the controller, there being a post tive lock to prevent movement of the controller beyond certain positions at that time because if the controller should go beyond those positions there was danger either of opening some necessary circuit or of causing a short-circuit. With my cut-out switch these dangers are avoided and the uninjured motor or motors are put under rheostatic control of the controller in all positions of the latter with absolute safety.

Another object of my invention is to provide a novel interlock between the main controlling drum'and the reversing switch so that it will be impossible for'an ignorant or careless operator to reverse the motors while current is flowing through the motor circuits.

In one of its aspects my invention consists of a controller for a plurality of electric motors, comprising a controlling switch, a reversing switch, and a cut-out switch so connected and arranged that any single motor may be cut out without interfering with the control of any other motor through all positions of the controlling switch.

In a more specific aspect my invention con.- sists of the combination of two electric motors, a controlling switch therefor whereby the motors may be connected in series and in parallel, a reversing switch for the motors, and a cut-out switch by means of which either motor may be cut out and the other motor so connected to the controlling switch that in all its positions the latter may control said other motor.

' In another aspect my invention consists of the combination of a controlling drum, a

reversing switch, and a magnetically opcr RIC MANUFACTURING COMPANY, A

at-ed interlock between the controlling drum and the reversing switch.

More specifically, my invention consists of the combination of a controlling drum, an iron shaft therefor, an iron notch plate on said. shaft, a blowout magnet having the shaft as part of its magnetic circuit, a re vcrsing switch, and an iron lever opera ted by magnetic leakage from the shaft and notch plate to lock the reversing switch when the blowout magnet is energized.

Other features of my invention will appear in the following dcscri tion and accompanying drawings and. will is out in the appended claims.

Figure 1 is an elevation of a controller, partly broken away and with the front part of the casing removed, showing my improved interlocking device. Fig. 2 is a plan view of the controller of Fig. 1 with the cover and operating handles removed, and part of the casing broken away. Figs. 3 and 4 are partial plan views similar to Fig. 2, butwith certaiu parts broken away to more clcarlv show the operation of the interlocking mechanism. Fig. 5 is a diagram of the connections of my controller. Fig. 6 is a set of simple connection diagrams showing the motor connections for the (.lifl'crcnt positions of the cut-out switch in the series and. parallel positions of the controller.

In the drawings A is the controlling casing in which are mounted a series-parallel controlling drum or regulating switch B, a reversing switch C and a cut-out switch D. The controlling drum. and reversing switch have cooperating contact fingers?) and c and are 0 )erated by the removable handles B and respectively, the cut-out switch being also preferably arranged to be operated by the handle 0. of the reversing switch. The

otherwise fastened to said cores and serve as bearings for the shaft G of the cont-rolling drum. The parts A, E, Fand G, are all of iron or other magnetic material, and form parts of the blowout magnetic circuit. The magnetic'circuit may be completed in any e particularly pointed desired: manner, for instance as set forth in my copending application Serial No. 309,027

that the controller shaft .and controller casing form arts of a magnetic circuit, preferably of the b owout 1nagnetic"circuit, and this may be accomplished in any desired manner.

The blowout coils E may be connected as desired, but are, preferably connected in v series with the motors as shown diagrammatically in Fig. 5. 4

Mounted on the shafts of the controlling drum. and reversing switch are notch plates or'star Wheels H and which coact the usual spring pressed awl rollers h and i- Extending u wardly om and preferably integral with t e star wheel I respectively, with H is a ring K provided with a notch K.

The upper edge of this ring is the same lane as the upper su ace of notch plate I. ivoted to the casing A is a bellcranklever L drawn to the left by a spring L. This lever has the end of one arm bent at right angles to form a finger l'which is referably in arranged to engage with the notches I of the.

notch plate Iunder certain conditions. .The other arm of the lever L extends towards the ring K and at its end is formed into a shoe 1 shapedto fit the ring K. The notch plates H and I, the ring K and the lever L are all of magneticmaterial, such as iron. Between the two arms of the bell-crank lever is a shelf Z to which is bolted a brass pawl M.

When the controlling drum is in off position, the pawl M rests in the notch K of own diagrammatically inthe ring K, as sh .Fig- 3. The reversing switch is nowfree to move to any of itsthree positions, ahead,

If the reversingneutral, or back. switch is in neutral osition and the controlling .drum is moved out of off' the pawl M rides on ring K,' leaving notch K,

- and thus the bell-crank lever L is moved'to the right and thefinger Z seats itself in the middle notch I ment to either ahead or back position and the motor circuits being broken at the i 65 magnetized and the shoe Z is attracted to- POSltlOIl,

as shown in Fig. 2. The reversing switch is now locked against movenotch plate I as shown in-Fig 4, thus locking 70 the reversing switch against movement. The shoe Z does not quite engage the ring K because the finger Zis made long enough to strike the bottom ofnotch I before such engagement takes place. Thus friction in turning the controller drum is avoided. The depth of the middle notch I might be .such that when finger Z is seated therein, arm L is not far enough to the right to allow pawl M to leave notch K. With such an arrangement the controller drum could notbe rotated with the reversing switch in neutral position.

In order to lessen magnetic leakage directly between the notch plate H or ring K, and the casing A, said casing may have a hole (1 directly back of the notch plate and ring, and, if desired, this hole may be cov: ered with aplate a of brass or other nonmagnetic material.

The cut-out switch D is referably constructed as fully shown and described in my cp-pending application Serial No. 309,026 filed -March 31, 1906, but is no part of my'present invention a detailed description of it will not be given here. This cut-out switch consists of three blades mounted on a shaft D and arranged to be moved into three positions. Its connections are here especially designed for a controllerfor two ser es motors 1 and 2, but obviously a plurality of motors in parallel might be su stituted for each singe motor. In the middle position of the cut-out switch, both motors are connected, while in either extreme position, one motor only is connected.

The complete electrical connections of my controllerand cut-out switch are shown diagrammaticall in Fig. 5. In positions 1 to 6 inclusive of t e controlling drum the motors are connected in series, and in ositions 7 to 10 inclusive, they are in paral el. If, however, one motor or the other were disabled it would be dangerous touse the controller unless that motor were completely, cut-out. This I accomplish by m cut-out switch which when cutting out eit er motor so connects the remaining motor that it ma be safely controlled through all positions o the controller.

The row of diagrams at the left ofjFig. 6 show. in simple form the connections of the cut-out switch controller in its series positions, and the corresponding dia ams atthe right show the connections for t e same-positions of the cut-out switch with the controller in its parallel positions. In these diagrams the trolley T is shown in the center of the figure to avoid confusion from crossing of.

wires; When the cut-out switchis in its 130 I assuch structure I middle or normal position, both motors are connected and the controller has its normal series-parallel control of the motors, as shown in Fig. 5'and more simply in the upper diagrams of Fig. 6. If it is desired to cut out motor 1, the cut-out switch is moved into its upper position, as shown in the middle diagrams of Fig. 6, thus completely disconnectlng motor 1 and making such connections that the remaining motor 2 is put under rheostatic control of the controller through all positions of th'e'latter. If it is desired to cut out motor 2, the cut-out switch is moved into its lower position, as shown in the lower diagrams of Fig. 6, thus completely disconnecting themotor 2 save for its ground eonnew tion, and making such connections that the other motor 1 is put under rheo'static control of the controller through all positions of the latter. By the operation of this cut-out switch no part of a motor which is cut out is connected to the trolley, and thus no shortcircuit through a grounded motor can occur. Obviously the permarent ground connection of motor 2 can cause no harm. Thus when Although I have shown'and described my I invention in the particular form which I now prefer, I do not wish to he limited to the precise structure shown and described, for many.

changes may be made in the construction of the various parts without departing from the broad spirit of my invention, and all of these obvious modifications are intended to be covered by my'claims.

What I claim as new and by Letters Patent is 1. In a controller, a controlling drum, a reversing switch, and a magnetically operated interlock between the. controllingdrum and the reversing switch.

desire to secure '2. Ina controller, a controlling drum, a reversing switch, a blowout magnet, andan interlocking device between the controlling drum and the reversing switch, operated by the blowout magnet.

In a controller, a controlling drum, a reversing switch, and a magnetically operated device for locking the reversing switch against movement whene ver current is flowing through the controller.

4. In a controller, a controlling drum, a reversing switch, a blowout magnet, and a deviceoperated by the ,blowout magnet for locking the reversing switeln'm whatever po sition it maybe when the blowout magnet is energized.-

' filln a controller, a. contrqllin drum, a

reversing switch, a locking device or-the reversing switch. and a --blowout m agnet which alsoo erates'izaidlocking device. a

drum, a

6. n a controllr, a controlling switch when the blowout magnet reversing switch having three positions, and

means operative when the controlling drum is not in oil position. for magnetically locking the-reversing switch if it is in either on position, and for mechanically looking it if" it is in neutral position.

7. In a controller, a controlling drum, a reversing switch having three positions, and

means operative when the controlling drum is in any on position for magnetically locking the reversing switch in whatever position it may have, it current is flowing through the controller, and for mechanically preventing thereversing switch from rnovement into another position if current is not flowing through the controller.

8. A controlling device for electric motors comprising a regulating switch, a reversing switch, a blowout magnet, and a device operated by the blowout magnet when the latter is energized for locking the reversing switch against movement.

9'. In a controlling device for electric motors in which separate switches are employed for regulating and reversing, the combina-. tion with said switches of a magnetically operat'ed interlocking device between the two switches.

I 10. In a controller for electric motors, a

regulating switch, a reversing" switch, and magnetically operated means for locking the reversing switch when current is supplied from the line to the motor or motors through the controllen,

, 1]. In a controller, a controlling drum, a reversing switch, an iron ring on the shaft of thecontrolling drum, a notch plate on the shaft of the reversing switch, an iron lever coacting with the ring and the notch plate, and a coil which when energized magnetizes the ring, the latter thereby attracting one end of the lever, thus causing the other. end thereof to engage the notch plate and lock the reversing switch against movement.

12. In a controller, a controlling drum having ashaft, an iron disk on said-shaft, a reversing switch, an iron lever coacting with the disk and reversing switch, and a coilv which when energized magnetizes the disk, thuscausing it to attract the lever, the le- 13. Ina controllna controlling drum, a reversing switch, a blowout magnet, and a locking device for the reversing switch op- 'ver by its movement locking the reversing switch.

erated by magnetic leakage from the meg- 'netic blowout circuit.

14. In a eontroller,'a' controlling drum, an iron shaft thereforfa blowout magnet having the shaft as part of its magnetic circuit, areversingswitch, and an iron locking lever for the reversing switch actuated by magnetic leakage from the shaft to lock said reversing is ener- 15. In a controller, a controlling drum, an iron shaft therefor, an iron notch plate on said shaft, a blowout magnet having the shaft as part of its magnetic circuit, a reversing switch, and an iron lever operated by magnetic leakage from the shaft and notch plate to lock the reversing switch when the lowout magnet is energized.

16. A two motor controller, com rising a controlling drum having series an parallel positions, a reversing switch, and a unitary cut-out switch for cutting out either motor while still permitting the other motor to be controlled by the controlling drum through allpositions of the latter.

17. A two motor controller, com risin a controlling drum having series an para lel positions, a reversin switch, and a cut-out switch having three blades so connected and arranged that either motor can be out out without interfering with the control of the other motor through all positions ofthe controlling drum.

18. A controller for two electric motors comprising a controlling switch having series and parallel positions, a reversi switch, and a S111 le cut-out switch having a plurality of b ades and connected andarranged to cut out either motor and at the same time complete connections whereby the other motor may be controlled throu 11 all ositions of the controlling switch witIiout anger to either motor.

19. A controller for a plurality of electric motorscompris'ing a regulating switch having series and parallel positions, a reversing switch, and a cut-out switch operable only in its entirety and so constructed and connected that any single one of the motors may be cut out without interfering with the safe control of any other motor for-all positions, of the regulating switch.

20. In combination, two electric motors, a controlling switch therefor whereby the motors may be connected in series or in parallel, a reversing switch for the motors, and a single cut-out switch by means of which either motor may be cut out and the other motor so connected .to the controlling switch that through all its positions the latter may control said other motor.

21. In combination, a motive apparatus comprising a 1plurality of motors, a re lating switch t erefor, constructed an arranged to connect the motors in series and in parallel in its different positions, a switch for reversing the motors, and a unitary cut-out switch so connected and arranged that any single one of the motors may be disconnected while still permitting the regulating switch through all its positions to safely control the remaining motlve apparatus.

22. A two motor controller comprising a regulating switch, single cut-out switch so connected and arranged that either motor may be cut out while still permitting the regulating switch through all its positions to safely control the other motor. i

23. A controller for a plurality of electric motors comprising a controlling switch, a reversing switch, and a cut-out switch operable only in its entirety and so connected and arranged that any single motor may be cut out without interfering with the control of any other motor through all positions of the controlling switch.

24. In combination, two electric motors, a controlling drum and a reversing switch therefor, and a unitary cut-out switch having a plurality of blades so connected and arranged that both motors may be connected or either motor disconnected and the controlling drum through all its ositions control the motor or motors wl iich are connected.

25. In combination, a plurality of electric motors. a plural bladed cut-out switch operable only in its entirety and so connected and arranged that all the motors may be connected or any single motor disconnected, and a controlling drum for the motors which through all its ositions controls those motors which may be connected. i

26. A controller for electric motors comprising a controlling switch for'connecting two motors in series and parallel relation, a reversing switch, and a unitary cut-out switch soconnected and arranged that it may disconnect either motor and complete connections whereby the other under rheostatic control of the controller through all positions of the latter.

.In testimony whereof I affix my signature, in the presence of two witnesses.

, EMMETT w. STULL.

Witnesses:

GEO. B. SCHLEY, FRED JJIQINSEY.

a reversing switch, and a motor. is 

